Definitely a combination of html, flash, etc. These aren't games developed by Google -- rather games running on Google's platform (similar to Facebook games).

Cool. Would be nice to hear that they're definitely supporting HTML5 though!

Yeah, it would be an opportunity for Google to nudge people off of legacy browsers. Some sort of message like "These games run best in Chrome, Firefox, and IE9" Better to offer the carrot than the stick.

Why all the downvotes? Isn't the technology they're supporting important? :P There's not even any mention on their developer blog here: http://googleplusplatform.blogspot.com/2011/08/stepping-onto...

I think it's because "supporting HTML5" is something with nebulous meaning, and not allowing people to make canvas games in this day and age would be shooting themselves in the foot big time, so it's quite unlikely that they won't. I don't think that deserves downvotes, though. People just surly.

I see. Still, I don't think "HTML5 games" is as vague as "HTML5" - it pretty much means either canvas or SVG. And it would be nice to hear an explicit line from Google on it - not sure why they haven't actually stated the supported technologies yet. I suppose they're still working on it.

Yeah, I thought your question was totally reasonable— just take the downvotes as "They probably will."

What other standard do you imagine they might be supporting? Flash? Silverlight?